996 with the factory Aero Package that is supposed to look like a GT3. this was a dealer installed option as well as a factory order option. The parts were stupid expensive from Porsche. One of the editors of European Car mag did the conversion on his Porsche and featured it in a 6 part article. I had one in a few months back. sold it for $15k because no one wants early 996 cars due to the engine reputation.
You sold it for $15K because it was in $15K condition. An excellent condition 996.1 aero can still command $ well into the 20s.
That aerokit is an amazing look and Porsche regularly offers one kit to share between its Carrera/GT variants. Ain't nuttin' new.